The LaCie 301996 3TB 2big Spare Drive is for use with 2big Quadra. The spare drive and drawer increases security in the unlikely event of a drive failure. You can immediately and easily hot-swap a failed drive. The capacity of your spare drive must be equal to or higher than the capacity of the drive being replaced.
Reviewed by 1 customers
Don't get fooled as I did by thinking that the 'hot-swappable' 2BigQuadra can be upgraded and the discs leisurely put in and out of the shell. Once moved out than back in, your source drives will NOT read anymore as teh Raid system defaults to Failure mode. I had to send my drive bac kto LaCie to recover access to my original discs.